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mjr
@mjr
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Joined: Feb 23, 2022
Last seen: May 7, 2026
Profile Activity
Topics: 2 / Replies: 301
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RE: 14kW Midea ASHP in an old leaky building

I think the worst I had was 15 minutes between starts. I expect it's no big stress for the system, but it really dents the efficiency, which is why I ...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 14kW Midea ASHP in an old leaky building

My add-on Raspberry Pi controller does implement just such a thing, with a next_permitted_change countdown timer, currently generally one hour minimum...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Most sustainable and innovative domestic product of the year

After seeing Dave Gorman tot up the fees for a "Product of the Year" contest, I'm very cynical: who says it is "Most sustainable and innovative domest...

4 years ago
Forum
Your Home
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RE: New Valiant ASHP system in NE Scotland

Come now, Derek, but then the owners of the utility companies would not be sure that their fixed costs would be covered and you can't expect capitalis...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Looking to make our 2 bedroom Victorian mid-terrace house greener

@saz as I understand it, flow rate is higher and more critical with heat pumps and a lot of microbore was installed badly, with sections shared betwee...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Swytch eBike conversion kit raises £3.8million

Swytch looks great for daytime fair-weather riders but it looks like it might not work for me or many other people who cycle for transport year-round ...

4 years ago
Forum
Renewable-powered transport (EVs & e-bikes)
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RE: Avoiding the supermarkets

Where are you getting the liquid soap ingredients from and what recipe are you using, please? I'm currently using the little cif dilute-at-home refi...

4 years ago
Forum
Your Home
Reply
RE: Ecodan Room Temperature Mode

@alec-morrow I can't completely agree with that. The Mitsubishi FTC6 is simply not smart enough yet for all homes. I'm not here to make the fine adjus...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 14kW Midea ASHP in an old leaky building

@kev-m The graphs are from the OpenEnergyMonitor emoncms add-on app called "MMSPHeatPump" which was posted to their forums. The output from the defaul...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 14kW Midea ASHP in an old leaky building

Yes, that seems to be what's happening. In this graph, blue is the power output the controller has worked out, red is what the pump actually uses and ...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 14kW Midea ASHP in an old leaky building

That will teach me to read too fast! I'd been away and only just managed to pass that horrible insulting discriminatory "are you a human?" test (I kno...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Vaillant Arotherm Plus issues - circulation, efficiency and performance

Some settings like the weather compensation curve are behind a long-press on the menu key (so not the usual tap to open the menu) but do not require a...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
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